无线视频通信中带宽分配策略  

Bandwidth Allocation Scheme over Wireless Video Communication

作　　者：刘春阳[1,2] 朱琦[1,2] 

机构地区：[1]南京邮电大学江苏省无线通信重点实验室,南京210003 [2]南京邮电大学教育部宽带无线通信与传感网技术重点实验室,南京210003

出　　处：《信号处理》2015年第6期737-743,共7页Journal of Signal Processing

基　　金：973计划(2013CB329005);国家自然科学基金(61171094);国家科技重大专项(2011ZX03001-006-02;2011ZX03005-004-03);江苏省自然科学基金重点研究专项(BK2011027)

摘　　要：本文针对无线网络中多用户传输视频时带宽分配问题,提出了一种基于微观经济学中供需平衡的带宽分配策略。该方法充分考虑了运营商的收益,在运营商和用户收益同时最大且供需平衡时,所求得的频谱价格即为运营商的出售价格。同时给出了针对不同用户等级有不同的用户优先级因子,体现了带宽分配的灵活性。用户效用函数的构建,考虑了不同用户传输不同内容视频时,所需要的带宽不同,体现出用户之间的公平性。各用户根据运营商提出的带宽价格,彼此相互博弈,最终使得自身效用最大。仿真结果表明:本文提出的博弈论方法存在纳什均衡解和均衡单价;用户等级因子能按照用户的不同等级来分配带宽;系统传输质量相比以往方法有所提高。In this study, in order to fairly and efficiently allocate the bandwidth in wireless multiuser multimedia communi- cation, a rate allocation framework based on balance of supply and demand in micro-economics was proposed. The proposed framework take a full consideration of the telecom operators profit and define the bid function as the unit price of frequency spectrum when the users and telecom operators have the maximum profits at the same time. Moreover a user priority factor for different users has be considered. The contents of different videos when proposing the utility functions to reflect fairness has be token consideration. Different users gamble mutually to achieve maximum profits. Simulation results demonstrate that the game theory in this paper have a Nash equilibrium point, the user priority factor plays a role when allocation band- width between different user grades. Also a better transmission quality compare with tradition rate allocation method has been showed in the simulation.

关 键 词：带宽分配 视频 供需平衡 博弈论 多用户 

分 类 号：TN919.72[电子电信—通信与信息系统]